Replied to ESP8266 as a local MQTT broker so the sensors keep working when the internet drops?

I tried exactly the uMQTTBroker thing at home last year and gave up on it, then did this, which has been solid for 8…

2 days, 19 hours ago

Replied to Uno resets every time my Pi script opens /dev/ttyUSB0

Thanks James. -hupcl alone wasn't enough, the first open after a reboot still reset it, like you said. Put the 10 µF cap on…

2 weeks, 3 days ago

Replied to Switching Wi-Fi bulbs from a board Switch through my Pi, no vendor app

Working! Got two WiZ bulbs. The command list filled up as soon as I added light.set to the catalog. First version the Switch only…

3 weeks, 4 days ago

Replied to Twenty DS18B20 probes on one Pi: dropouts past eight sensors and how to name the keys

Two buses on GPIO4 and GPIO17, 2.2k each, and I re-did the run as a line along the racks. 20 of 20 for two…

1 month ago

Replied to Uno as an I2C slave sending floats to a Mega and taking commands back: values come out garbled

Works first time, which never happens to me. Readings are clean and the valve opens when the Mega sends 1. I'd been sending text…

1 month ago

Started Uno resets every time my Pi script opens /dev/ttyUSB0

Bit of a beginner so sorry if this is obvious. I have an Arduino Uno clone (CH340 chip) plugged into a Raspberry Pi with…

1 month, 2 weeks ago

Replied to Twenty DS18B20 probes on one Pi: dropouts past eight sensors and how to name the keys

3 wires, 3.3V from the Pi. Legs are 30 cm to 1 m, it's more of a star than a line I guess.

1 month, 2 weeks ago

Replied to Remote Pi gateways reboot at random: how does the Pi detect undervoltage, and can I get an alarm for it?

On my desktop Pi a little lightning bolt shows up in the corner when the supply is bad, so it definitely knows somehow.

1 month, 2 weeks ago